Welcome to irv2.
Here is info on your MFG's systems for HWH
select the correct one for your year coach. You will have instructions for your system.
If you have four jacks I find that its easier to level each side rail starting with the side that has the yellow light.
You press the arrow that's straight up and as you do both red lights for that side will come on, front and rear jacks.
When the yellow light goes off than press the up arrow for opposite side until the yellow light goes off.
If you parked the coach on a fairly level pad, than you are level when yellow light goes off.
If by chance the yellow light moves to rear or forward press the up arrow button until light goes off.
All red lights will be on when you have leveled the coach and the yellow maybe off.
A front or rear adjustment may require for the yellow light to be on because you would lift coach to high on jacks to be safe.
When your parking coach turn on the system on button and you will see yellow light come on position the coach for the most level location on pad and you may get yellow light to go off, if thats the case than all you will have to do is put jacks down to stable the coach to ground pad so it does not move when your walking in it.
Never lift the coach chassis so rear tires are lifted of ground because you may cause the jacks to bend on chassis frame.